Improvement in circular-sawing machines



l. G. STEAD.

Circular Sawing-Machines;

Patented 0c:. 20, I874.

l l I Scale For Fug 3 INVENTOR fi o UNITED STATES PATENT Orrron.

JAMES C. STEAD, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT lN ClRCULAR-SAWING MACHINES.

Specification forming part of Letters Patent No. 156,045, dated October20, 1874 application filed January 7, 1873.

To all whom it may concern:

Be it known that I, JAMES (J. STEAD, of Jersey City, in the State of NewJersey, have invented certain Improvements in Circular- Sawing Machines,of which the following is a specification My invention relates to awood-sawing machine in which there is combined with a circular saw andthe frame and table on which it is mounted, a separate movable bed, uponwhich the wood is placed to be sawed, the upper surface of said bedbeing placed at some other than at right angles to the saw, and havingupon one side an adjustable guide, held at right angles to said bed,together with an adjustable rotary guide upon the opposite side, andcomically-shaped rev'ersed feed-rollers, the whole being so constructedand operating that rectangular blocks of wood may be therebyconveniently sawed through on a line other than parallel to the sides ofthe same.

Figure 1 is a side elevation of my circularsawing machine. Fig. 2 is aplan of the same. Fig. 3 is an end elevation of the same.

L is a substantial frame, upon which the several parts of the mechanismof my machine are mounted. It may be made of either wood or iron. S isthe circular saw upon its arbor Y, with its pulley E. Q is a bed-plate,preferably of iron, having an opening admitting the saw mounted upon theframe, inclined to the plane of the saw at the fixed angle at which itis desired to present the wood to the saw. F is a guide or gage, alsopreferably of iron, extending nearly or quite the length of the bedplate Q, and rising from it at right angles to its upper face. It issecured in position upon the bed-plate by bolts passing through theplate, and ears formed on the lower edge of the guide. The bolt-holes inthese cars being slotted, the guide is adjustable, and may be set at anydesired distance from the saw. N and M are the feed-rollers, madeconical, and placed upon theirrespective shafts, K and Z, reversed-thatis to say, with the larger end opposite the smaller end of the other.The taper of the said rollers corresponds with the inclination of thebed-plate Q. J is a rotary guide running looseupon the shaft K, andpressed against the block in sawing by the spiral spring K, thus makingit adjustable to-blocks of different thickness. The inner surface ofthis guide is beveled from a line commencing with the small end of theroller M outward toward the periphery, the beveled surface below thesaid roller beingparallel with the face of the guide F. Motion isc0mmunicated to the feed-roller N, from the belt-pulley D, through thewheels B and A, and to the roller M through the gears B and A. Theseveral shafts ofthese gears are mounted in suitable journal-boxes. TherollerMis'made yielding by the springs, (rubber being preferable,)placed over the upper section of the journalboxes, the pressure upon thesame being adjusted by means of the screws 0 and O". H is a fixed wedge,placed immediately behind the saw, to separate the sections of the woodbeing cut, to relieve friction on the saw. P is a yoke or standard, inwhich is mounted a small loose pulley, designed to hold down the wood inthe process of cutting, after it leaves the feed-rollers. O is a loosecone pulley, corresponding in size and shape to the feed roller N andLis a leaf-spring, intended to press the 'wood against the guide F. Bymeans of this roller and spring the proper presentation of the wood tothe feed-rollers is secured.

This machine is especially adapted for giving to blocks of wood thebeveled form used. in the construction of certain descriptions of woodenroad-beds but it is also useful in sawing blocks or pieces of wood forany purpose where it is desired that the plane of the sawcut should beat some other than a right angle to the top and bottom surfaces, andother than parallel to the side surfaces of the wood it is designed tosaw.

It will be observed that no provision is made in this machine to alterthe angle of inclination to the saw at which the wood will be presentedto be cut. Such alteration can be effected onlyby exchanging thefeed-rollers, the bed-plate, the fixed guide F, and the loose guide J,for others of a different form. If,.

however, it is desired to change the angle of inclination, otherpulleys, guides, and bedplates may be provided and keptfor use adaptedto anydesired angle of inclination but, when the several parts of themachine are in position and ready for use, it is not intended that thereshall be any adj usta cility of the parts,

the wood being presented by them at a fixed an 1e.

ffhe operation of the machine is obvious.

'For example, blocks of wood designedi'or a road-bed are usually fromthree to five inches in length, cut from deal or plank four to sixinches in thickness. For one description of road-bed these blocks aremade wedge-sh aped, and set in the road with the thick ends downward,forming the base, leaving an acute triangular space between the blocksfor gravel, &c.

To out these blocks into the tapering form by iny machine, being sawedinto proper lengths from plank or deal, the opposite sides of which areparallel, they are placed on end, or with the grain of the woodperpendicular, upon the tableQ, and one after another fed in between therollers M N, the spring L pressing each, as it enters, against the guideF. The feed-rollers Will carry them against the saw, and the saw and N,the rotary beveled spring pressureguide J, mounted upon, and runningloosely upon, the shaft of the roller, all arranged and operating as andfor the purpose specified.

v JAMES C. STEAD.

Witnesses:

J. v1P. FITCH,

A. LIVINGSTON MILLs.

